The University as a whole is having network connectivity problems. More details are here.

On Thursday, March 31, 2011, we will have a scheduled downtime from 4:00am to 8:00am EDT.

This downtime affects all users of the department\’s computing and networking infrastructure.

Scheduled work includes:

• Final work to replace core network switch/router
• Updates to web server provisioning and configuration

During some of the 4am-8am window, most of the services (e.g., E-mail, web, cycle servers) will be unavailable. E-mail destined to the department will be queued and then delivered at the end of the maintenance window.

As of 11:30 PM on Thursday, January 20, the virtual web server, virtweb, is unavailable due to memory problems. This issue impacts all project-related web sites within the CS Department. Correcting the problem requires on-site access to the host and will be addressed on Friday morning.

We apologize for any inconvenience that this may cause.

UPDATE: 1/21/2011 – One or more processes on the virtweb server had a problem with run-away memory allocation requests. The server was rebooted this morning and all of the web sites hosted on it are now available.

On Saturday, January 22, 2011, from 6:00am to 9:00am EST, there will be a power shutdown in the CS Building. The shutdown will include the electrical panels that supply most of the power to the building including lighting and power to all the offices, hallways, and lab spaces, as well as the elevator.

Please note that this means that all office and lab computers need to be cleanly shutdown before the start of work early Saturday morning. For most users, we expect that you will shutdown your machine(s) when you leave Friday afternoon/evening.

Also note that the power to the main machine room (room 218) is on a separate electrical feed and will remain operational. Therefore, services such as e-mail, web sites, cycle servers (including the c2 cluster), and remote access will not be interrupted.

This work is part of an ongoing project to increase the power and cooling capacity of our basement machine room (room 002).

On Thursday, January 20, 2011, we will have a scheduled downtime from 4:00am to 8:00am EST.

This downtime affects all users of the department\’s computing and networking infrastructure.

Scheduled work includes:

• Upgrade of penguins, cycles, and other systems to CentOS 5.5
• Updates to Zimbra
• Upgrade the print server
• Maintenance/re-configuration of some of our networking infrastructure

During some of the 4am-8am window, most of the services (e.g., E-mail, web, cycle servers) will be unavailable. E-mail destined to the department will be queued and then delivered at the end of the maintenance window.

The other work is part of the normal maintenance of the department infrastructure.

12/21, 7:30am: The database server that feeds the main department web pages is having trouble. We are investigating.

12/21, 8:00am: The database server is back up and the web pages are operating normally.

12/22, 1:15pm: We have identified the root cause and are implementing a fix. The main department website may operate in a degraded mode from time to time today.

2:20pm: Our e-mail service is currently down. We are working with the vendor to correct the problem.

2:30pm: E-mail is operating again.

2:45pm: The ProofPoint server is currently not blocking Spam e-mail we are working with the vendor to correct the issue.

3:30pm: The ProofPoint server is now blocking Spam e-mail again.

3:30pm: E-mail is operating normally.

11:05am: Our outgoing e-mail service is currently down. We are working with our vendors to correct the problem.

11:45am: E-mail is flowing again. We are still on the phone with our vendor.

11:54am: E-mail is operating normally.

On Thursday, September 9, 2010, we will have a scheduled downtime from 4:00am to 8:00am EDT.

This downtime affects all users of the department\’s computing and networking infrastructure.

What is happening:

• We will be moving home directories back to their proper place in the NetApp storage pool.
  • At our last downtime, we moved the home directories to a temporary area in our disk storage array so that we could reconfigure the disk space for increased redundancy. At this downtime, we will move the home directories back to their proper location. (This movement is transparent to the users.)
• We will be updating the Zimbra e-mail software.
  • The Zimbra update is part of normal maintenance. The update includes both bug fixes and some feature enhancements. This anticipated update wasn\’t available earlier in the summer so we are doing it now before the semester begins

On Saturday, July 17, 2010, OIT will have a scheduled downtime from 6:00am to 10:00am EDT.

This downtime affects all users of the CS Network (in the CS Building, Sherrerd Hall, and 221 Nassau Street).

There will be an interruption of all network and Tiger TV services to the Equad, Computer Science, Mudd Library, Sherrerd Hall, and 221 Nassau Street.

For details, see the OIT posting.